Hi Sui, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on wsa/i2c/for-next] [also build test ERROR on v5.15 next-20211111] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Sui-Chen/I2C-statistics-as-sysfs... base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next config: parisc-defconfig (attached as .config) compiler: hppa-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/769ea06c7d8b5744deba5e6cfe2df6d90... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Sui-Chen/I2C-statistics-as-sysfs-attributes/20211110-065938 git checkout 769ea06c7d8b5744deba5e6cfe2df6d9079b41df # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=parisc SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): hppa-linux-ld: drivers/i2c/i2c-core-base.o: in function `i2c_register_adapter': --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org